Inducible overexpression of Ideal Plant Architecture1 improves both yield and disease resistance in rice

Mingming Liu, Zhenying Shi, Xiaohan Zhang, Mingxuan Wang, Lin Zhang, Kezhi Zheng, Jiyun Liu, Xingming Hu, Cuiru Di, Qian Qian, Zuhua He, Dong-Lei Yang
Nature Plants, 2019, 5 : 389-400  DOI: 10.1038/s41477-019-0383-2;      追溯原文......本站官方QQ群:62473826

Breeding crops with resistance is an efficient way to control diseases. However, increased resistance often has a fitness penalty. Thus, simultaneously increasing disease resistance and yield potential is a challenge in crop breeding. In this study, we found that downregulation of microRNA-156 (miR-156) and overexpression of Ideal Plant Architecture1 (IPA1) and OsSPL7, two target genes of miR-156, enhanced disease resistance against bacterial blight caused by Xanthomonas oryzae pv. oryzae (Xoo), but reduced rice yield. We discovered that gibberellin signalling might be partially responsible for the disease resistance and developmental defects in IPA1 overexpressors. We then generated transgenic rice plants expressing IPA1 with the pathogen-inducible promoter of OsHEN1; these plants had both enhanced disease resistance and enhanced yield-related traits. Thus, we have identified miR-156–IPA1 as a novel regulator of the crosstalk between growth and defence, and we have established a new strategy for obtaining both high disease resistance and high yield.



  Squamosa启动子结合蛋白基因; 理想株型基因 OsSPL14; IPA1;WFP
  多蘖半矮秆; 微RNA OsmiR156h; sdt; miR-156; miRNA156; miR156j